Metallic packing.



V. E. & R. G. NELSON.

METALLIC PACKING.

APPLICATION FILED SEPT. 2o, 1912.

Patented 1100.211914.'

Fig. 2,

UNITED STATES PATENT oEEIcE.

VICTOR E. NELSON AND REYNOLD G. NELSON, 0F DETROIT, MICHIGAN, ASSIGNORS, BY i DIRECT AND MESNE ASSIGNMENTS, 0F FIFTY-ONE ONE-HUNDREDTHS TO SAID or DETROIT, MIcHGAN.

Hannow,

METALLIC PACKING.

Specication of Letters Patent.

Application mea september 2o, 1'91`2. 'serial Ne. 721,410.

To all rwhom z't may concern.'

\Be it known that we, VICTOR E. NELSON and REYNOLD G. NELSON, citizens of the United States,l residing at Detroit, county of Wayne, State of Michiganhave invented a certain new and useful Improvement in Metallic Packing, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to metallic packing for use with shafts and in 'other situations `hereinafter described, and has for its object a simple and efficient packing in which wear is automatically compensated for and a tight joint continuously preserved and which is durable, inexpensive to manufacture and easily assembled in place.

This device is particularly adaptable for use for packing thecrank shafts of twocycle gas engines for preventing escape of compressed gas from the crank cham er and, as a furtherl indication' of its ran e of usefulness may be utilized at the port eading into the interior of a reciprocating hollowpiston such as is disclosed lin application, Serial No. 677,4?, filed February 14, 1912, and indicated i the drawings led herewith.

These and further objects of the invention are hereinafter more fully described and fclailned and shown in the accompanying drawings in which- Figure 1 is a vertical section of a part of a crank shaft and crank case of an internal combustion engineshowing the packing in position. Fig. 2 is a plan view o the packing rings. Fig. 3 is a vertical section of a portion of a gas engine cylinder showing the packing surroundingl the inlet port ileading to the explosive chamber. Fig. 4 is a section through the reciprocating piston taken at right angles to the line ofy section of Fig: 3. Fig. 5 is a like section showing the packmg `formed of a single split,I spring-metal ring.

Similar characters refer to similar parts throughout the drawings `and specification.

The packing preferably consists of a pair of concentric rings formed of spring metal, theinner ring l being preferably narrower in width than the outer ring 2. Thel two pressed and when in position there is a constant tendency for the rings to expand and they therefore ride out on the seat and the faces of the rings tightly engage against the surface it is desired to pack. l

As is well known, it is a diflicult matter to so pack the crank shafts of gas engines in which the compression takes place in the crank case as to prevent a loss of gas thereabout and this is particularly` true' in such cases where ball-bearings are used. Fig. 1-

shows the packing rings o n the crank shaft of the engme'with the bearing surface of the packing' rings engaging against the ball race usually secured to the shaft and the angular seat or recess for the rings is formed in the ca-p or gland b means of which the bearings are held in p ace. In this structure ity may be readily seen that the rings ltightly engage both the annular seat in the gland and the surface of the ring forming the ball race whereby an escape ofcompressed gas in its usual path between the gland and the ball race is eiectually prevented. In this instance the inner ring may be normally .greaterin diameter than the shaft about which it is positioned as the effectiveness of the packing is not enhanced by its closely engaging the shaft.

In Fig. 3 we have shown the rings as adapted for use at the inlet port "to the explosion of a gas engine of peculiar construction and inV this instance the annular seat or recess for the `rings is formed in the piston wall and by their constant tendency to expand the rings closely engage the cylinder wall andk arid 2. e

Patented Dec. 8,1914.

4By the formation of the packing of the two concentric rings as shown, each` ring .forms a closure for the opening between the ends of the other ring and by pinning them together at one point as shown, the open ends of the rings are held in their desired relation.

An alternative form of the packing is shown in Fig. 5, in which a single, split, spring-metal ring having a tapered or cone surface, seats in a like tapered recess. many instances this form will prove suiiiciently effective for all practical purposes as the only leakage possible may occur between the open ends of the ring which, evidently, may be of little or no consequence. With this one exception, the single ring is identical in action with that of the concentric rings.

It is to be noted that the tapered surface' of either the'single or the concentric rings 1s greater in length than the thickness of the ring. While this may be natural to its formation in the manner shown, it is of considerablevalue especially when utilizedin the manner shown in Fig. 1 in which the face of the ring bears against a rotating element, as the friction between the ring and the rotating element against which it presses is less than the friction of the ring in its seat. The ring therefore remains stationary in the seat and does not rotate with the rotating surface against which it engages.

Having thus briefly described our invention, what we claim is v 1. A metallic packing comprising a split ring of spring metal having a tapered `outer surface and a seat therefor having a like tapered surface whose diameter is less than the normal outer diameter of the ring.

2. A metallic packing comprising a pair of split, lconcentric rings of spring metal, one surface of the-- rings being vuniformly tapered to jointly provide a single cone surface, and a seat for said rings formed-with a correspondingtaper, the diameter of which is less than lthe normal diameter of the tapered surface of the rings.

3. A metallic packing comprising a pair of split, concentric, rings of spring metal,

the outer surface of each of the rings being uniformly tapered, and a seat for said 'rings formed with a like taper, the diameter of which is less than the normal outer diameter of the rings.

4. A metallic ypacking comprising a pair of split, concentric rings of spring material,

one Vsurface of the rings being uniformly tapered and the two rings being pinned together in a manner to break joints, and a seat for the rings having a taper corresponding to the tapered surface ofthe rings the diameter of which is less than the normal diameter of the tapered surface of the rings.

5. A metallic pacldng for the purpose described comprising a pair of split, concentric, rings of spring metal so relatively disposed as to break joints, means for maintaining the rings in their relative position, one surface lof each ring being uniformlyv tapered, and a seat for said rings formed with a like taper, the diameter of which is less than the normalg` diameter of the tapered surface of the rings.

6. A metallic packingcomprising a pair of split concentric rings of spring material, one surface of the assembled rings being uniformly tapered, and a seat for the rings formed with a corresponding taper, the diameter of which is less than the normal diameter of the tapered surface of the rings.

7. A metallic packing comprising a split ring of spring material having a tapered or cone surface and a seat therefor having a correspondingly tapered surface, the diameter of which is less than the diameter of the tapered surface of the ring.

8. A metallic packing comprising a split ring of spring material the outer surface of which is tapered, and a recess or container therefor of a depth substantially equal to the length of the ring and having a wall formed with a taper correspondingl with the tapered surface of the ring the'diameter of which is less than the outer diameter of the r1ng. v

9. A metallic packing comprising a pair of split rings of spring material concentrically disposed ina manner to break joints, and a recess or container therefor of a depth substantially equal to the length of the assembled rings and having a wall formed with a taper, a surface of the assembled rings being formed with a corresponding taper whereby both rings may seat against the tapered surface of the recess theV diameter of which is less than the diameter of the tapered surface of the rings.

10. A metallic packing comprising a splitl ring of spring metal provided with a taf pered surface greater in length than the thiclmess of the ring, and a seat therefor provided with a surface of a like taper whose diameter is less than the normal diameter of the tapered surface of the ring.

11. A metallic packing comprising a pair of split concentric rings of springmetal, .a

surface of the assembled rings being um-` formly tapered, the length of the tapered surfaces of the assembled rings being greater than the thiclmess of the two' rings, and a seat for said rings provided with a surface having a like taper the diameter of which is less lthan the diameter -of the tapered surface of the rings.

12. A metallic packing comprising a split ring of spring metal having a tapered outer surface and a seat therefor having a like tapered surface of a fixed diameter less than the normal outer diameter of the ring.

13. A metallic packing forl rods, shafts, etc.,'comprising a pair of concentric rings of spring metal, both of being uniformly/ taPered to jointly provi e a single cone sur ace, and a seat or saidrings also formed with a cone surface engaged by the cone `surface of the rings whose diameter is less than the normal diameter ofthe cone surface of the rings, the inner diameter of the inner ring when seated being greater than that of the rod on which it is positioned.

14. A metallic packing for rods, shafts, etc., comprising a split ring of spring metal having a tapered outer surface, a seat therefor having a like tapered surface of less diameter than the4 tapered surface of the ring, and means for holding the ring on the seat, the innendiameter of the ring when seated being greater than the diameter of the rod about which it is positioned.

In testimony whereof, we, sign this specification in the presence of two witnesses.

' VICTOR E. NELSON. REYNOLD G. NELSON. Witnesses:

ALFRED T. Hmow, Y CHARLES E WIsNnR. 

